Is the relationship between body length and body mass consistent across habitats? A case study on Niphargus (Crustacea: Amphipoda).

Body size is one of the main characteristics of any organism and influences various aspects of individual's biology. In animal ecology, it represents a key functional trait that can be quantified using different measures and is often used as a proxy for different organismal functions. The way we quantify body size is critical in any study using this measure alone or to scale other organismal traits.